Means for forming the fleece or web in carding machines



May 8, 1928.

G. C. LAURENCY MEANS FOR FORMING THE FLEECE OR WEB IN CARDING MACHINES Filed NOV. 2 1927 ja /2mm Gummy/v5 CZEMENT Mme/vex Patented May 8, 1928.

UNITED STATES orries.

eUILLAim CLEMENT-LAURENCY, or 'rwrcxnnnnn, ENGLAND, nss enon or sxx'r'r mm cam mo GRANT mcLn N, or {La oas s, marrn, Faeries.

MEANS FOR FORMING THE FLEECE OR WEB IN-CA-RDINGMACHINES.

Application tiled November 2; 1927, Serial No This invention relates to improvements in means for forming the fleece or web in card.- ing machines. w i

It is known that the carding Operation has afor its purpose the disentangling of the locks of fibres by cleaning and .separating thclatter front each other.

WVhen this operation is coin'leted the fibres pass from the carding macii form of a fleece or web which is then Wound in layeis or condensed into sliver or rovings. Inthe formation of said web the fibres lose the parallelism whichthe carding action may have given them, and the purpose of the present invention is to preserve in the web thisparallel position of the fibres obtained by the carding operation.

Broadly stated the invention consists in providing one or more rollers orcylinders which are designed to rotate about their individual axes and which,at the same time, advance over the section of the surface of the dofler cylinder that bears the fibres dofie-d from the card, in the'direction of Fig. 1 1s a partial elevation showing the' main members of a carding machine which transform the fibres into a continuous fleece or web with the present invention applied thereto. Fig. 2 is a detail view showing driving and braking means for chains which carry the rollersor cylinders.

p The fibres which are straightened and more or less parallelized between the hooks or teeth of the main cylinder A have their ends extending above said books when they reach the point C and they advance with said main cylinder until their said ends encounter the hooks of the doffer cylinder B. As the hooks of main cylinder A descend more rapidly than those of the doiier B the majority of the fibres turn round, and remain suspended on the hooks of doifer B as illustrated at D. In this position the fibres inc in the.

. 230,612,aii,d:in6reat Britain October 26, 1926.

regain their original.undulations, as they are free, and, by describing a semicircle withthe hooks of doifer EB, that portion of the fibres which is held by said hooks turns completely round whilstvthe freeportionis folded at the rear, the result being thatthese fibres become folded and entangled in the :fleece or web avhich is removed from the 'doiier PB atthe pointF. 1

According to the present invention, the fibres suspended on-.thehooks .ofthe doiier B are carried forward by "rollers or cylindersil, 2, 3 ands, which are'supported at .ztheirends by chains amounted at each side bf and below the doifer .B, ,the spindles of said rollers being capable of rotating freely in, special links provided in said chains, ,whilst they latter pass over two pairs of tootheclwheels or sprockets 6 andTmounted on two parallel axles 8 and 9 which extend" .fromsideito side ofthe machine. i

. Byjmeans. of the axle 9 and its two toothed wheels, the chains are given a linear speed higher than the circumferential speed of the dofier B, and at each revolution the rollers which they carry enter one after'another into contact with a different section of the sur face of the. dofi'er B. Owing'to this contact the rollers roll over the surface of the doffer in the direction of movement of the latter. This contact can be localized'or adjusted at both ends of the rollers so that they do not touch the hooks of dotfr B.

Thenumber of rollers may vary and their speed decreases when they are more numerous.

In the position shown in Fig. 1, the roller 1 which has nearly finished its course over the periphery of the dofi'er B raises the last fibres of the sector subjected to its act-ion,

and the, next roller 2 carries the'fibres towards the doffer hooks before entering into contact with the latter. Owing to this alternate action of the rollers, the fibres suspended on thedoffer are no longer folded at the rear, but are laid flat on the dofier in the direction of movement and extended forward atone end. The fibres are thus extended lengthwise in the fleece or web fur nished by the carding machine and consequently also in the lap, sliver or roving.

The contact of the rollers 1, 2, 3, 4 with the doifer B is determined by the tension of theupper run of the chains, and this tension is itself determined by the resistance of the axle 8. This resistance which ensures the degree of contact of said rollers, can be obtained by various known means. In F 1g.

2 a pulley 10 secured on the said axle 8 is surrounded by a brake band 11 from which is suspended a weight 12. The friction of this band increases the tension of the upper portion of the chains when the driving belt 13 rotates the axle 9 by means of the pulley 14.

What I claim as my invention and desire to secure by Letters Patent of the United States is i 1. In a machine for carding textile fibres, the combination, with a doiier, of a plurality of rollers which advance, in the direction of movement of the dofl'er, over a section of the surface of the dofi'er which bears the fibres dofied from the card at a speed higher than the circun'it'erentiz'il speed of the said doiier in order tocarry the ends of all the fibres forward on the dofi'er hooks.

2. In a machine for carding textile fibres, the combination, with a dotl'er, of a plurality of rollers which advance, in the direction of movement of the 'dofl'er, over a section of the surface of the dofi'ier which bears the fibres doii ed from the card, carrier chains for said rollers located below the dofier, a pair of axles, driving and guiding sprockets fixed to said axles and engaged with said chains, and means for adjusting the tension of the upper runs of the chains and, hence, the contact between the rollers and the dolier.

3. In a machine for carding textile fibres, the combination, with a doffer, of a plurality of rollers which advance, in the direction of movement of the dotl'er, over a section of the surface of the dotl'er which bears the fibres dofi'ed from the card, carrier chains for said rollers located below the doli'er, a pair of axles, driving and guiding sprockets fixed to said axles and engaged with said chains, and a brake device associated with one axle for adjusting the tension of the upper runs of the chains and, hence, the contact between the rollers and the dofl'er.

4.111 a machine for carding textile iibrcs, the combination, with a dotler, ot' a plurality of rollers which advance, in the direction of movement of the dotl'er, over a section of the surface of the dotl'cr which bears the fibres dofl'ed from the card, carrier chains for said rollers located below the doiier, a pair of axles, and driving and guiding sprockets fixed to said axles and engaged with said chains to move the chains at a linear speed which is higher than the circumferential speed of the dofler in order to carry the ends of all the fibres forward on the dofi'er hooks, said chains embodying special links wherein the pivots of the rollers are freely rotatable.

In witness whereof I have signed this specification.

GUILLAUME CLEMENT LAURENCY. 

